US9487493B2 - Use of a PPAR-delta agonist for treating muscle atrophy - Google Patents

Use of a PPAR-delta agonist for treating muscle atrophy Download PDF

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US9487493B2
US9487493B2 US14/478,594 US201414478594A US9487493B2 US 9487493 B2 US9487493 B2 US 9487493B2 US 201414478594 A US201414478594 A US 201414478594A US 9487493 B2 US9487493 B2 US 9487493B2
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muscle
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loss
day
disuse
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Maria Carmen Valcarce Lopez
Eliot Ohlstein
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vTv Therapeutics LLC
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Priority to US15/286,661 priority patent/US9968613B2/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/535—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines
    • A61K31/5375—1,4-Oxazines, e.g. morpholine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
    • A61K31/19—Carboxylic acids, e.g. valproic acid
    • A61K31/192—Carboxylic acids, e.g. valproic acid having aromatic groups, e.g. sulindac, 2-aryl-propionic acids, ethacrynic acid 
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/0012—Galenical forms characterised by the site of application
    • A61K9/0053—Mouth and digestive tract, i.e. intraoral and peroral administration
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P21/00—Drugs for disorders of the muscular or neuromuscular system
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
    • C07D295/04—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms
    • C07D295/08—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly bound oxygen or sulfur atoms
    • C07D295/096—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly bound oxygen or sulfur atoms with the ring nitrogen atoms and the oxygen or sulfur atoms separated by carbocyclic rings or by carbon chains interrupted by carbocyclic rings

Definitions

  • the invention relates to the fields of pharmacology and medicine, and provides therapeutic methods and compositions for treating muscle atrophy.
  • Muscle atrophy refers to the loss of muscle mass and/or to the progressive weakening and degeneration of muscles, including the skeletal or voluntary muscles (which control movement), cardiac muscles (which control the heart), and smooth muscles. Skeletal muscle atrophy is associated with bed rest, corticosteroid use, denervation, chronic renal failure, limb immobilization, neuromuscular disorders, sarcopenia of aging, and arthritis. Irrespective of the underlying cause of atrophy, reduced muscle activation/contractile activity (hypodynamia) is an invariant feature.
  • the fundamental molecular mechanism(s) underlying muscle atrophy and numerous cellular processes include decreased protein synthesis, increased protein degradation, suppression of bioenergetic pathways associated with mitochondrial function, and increased oxidative stress (Abadi et al., PLoS ONE 4(8):e6518 (2009)).
  • Upstream triggers that initiate muscle atrophy are poorly understood and may vary depending on the pathological context; however, animal data suggests that disparate atrophic stimuli converge on the activation of protein degradation, particularly the ubiquitin (Ub)-26S proteasomal pathway.
  • Atrogin-1 muscle atrophy F-box protein
  • Muscle ring finger protein Muscle ring finger protein
  • MoRF-1 muscle ring finger protein
  • Existing treatments for muscle atrophy include exercise or physical therapy (when possible), functional electrical stimulation of muscles, and amino acid therapy (e.g., administration of branched-chain amino acids (BAAs)) to attempt to regenerate damaged or atrophied muscle tissue.
  • BAAs branched-chain amino acids
  • anabolic steroids such as methandrostenolone have been administered to patients.
  • the efficacy of existing treatments has been limited, and the use of BAAs and anabolic steroids are both known to produce side effects.
  • BAAs can cause fatigue and loss of coordination
  • anabolic steroids can cause cardiovascular disease, impaired liver function, and both estrogenic and androgenic effects (e.g., acne, body/facial hair growth, male pattern baldness, and gynecomastia). Accordingly, there remains a need for improved therapies for the treatment of muscle atrophy.
  • the present invention relates to the use of a PPAR ⁇ agonist to treat muscle atrophy in a subject in need thereof.
  • Certain variations of the present invention provide improved treatment of muscle atrophy by administering a PPAR ⁇ agonist to a subject in need thereof.
  • the present invention is directed to a method of treating disuse-associated muscle atrophy in a subject in need thereof comprising administering to the subject an effective amount of a PPAR ⁇ agonist.
  • the PPAR ⁇ agonist is selected from the group consisting of:
  • the PPAR ⁇ agonist is (E)-[4-[3-(4-Fluorophenyl)-3-[4-[3-(morpholin-4-yl)propynyl]phenyl]allyloxy]-2-methyl-phenoxy]acetic acid or a pharmaceutically acceptable salt thereof.
  • the present invention is directed to a method for reducing disuse-associated muscle atrophy in a subject in need thereof comprising administering to the subject an effective amount of a PPAR ⁇ agonist.
  • the disuse-associated muscle atrophy is caused by limb immobilization in the subject.
  • the disuse-associated muscle atrophy is caused by use of a mechanical ventilator by the subject.
  • reducing disuse-associated muscle atrophy comprises reducing the rate of loss of muscle strength in a muscle tissue of the subject relative to a control, wherein the rate of loss of muscle strength comprises a comparison of one or more measurements of muscle strength in the subject to a baseline measurement of muscle strength in the same subject prior to a period of disuse, wherein muscle strength is measured by a muscle strength test.
  • reducing the rate of loss of muscle strength in the subject comprises a return to the subject's baseline measurement of muscle strength faster than the control following a period of disuse.
  • the loss of muscle strength in the subject is less than the loss of muscle strength relative to the control during a period of disuse.
  • reducing disuse-associated muscle atrophy comprises reducing the rate of loss of muscle mass in a muscle tissue of the subject relative to a control, wherein the rate of loss of muscle mass comprises a comparison of one or more measurements of muscle volume in the subject to a baseline measurement of muscle volume in the same subject prior to a period of disuse, wherein muscle volume is measured by the cross-section area of a muscle.
  • reducing the rate of loss of muscle mass in the subject comprises a return to the subject's baseline measurement of muscle mass faster than the control following a period of disuse.
  • the loss of muscle mass in the subject is less than the loss of muscle mass relative to the control during a period of disuse.
  • reducing disuse-associated muscle atrophy comprises reducing the rate of loss of Type I muscle fibers in a muscle tissue of the subject relative to a control, wherein the rate of loss of Type I muscle fibers comprises a comparison of one or more measurements of Type I muscle fibers in the subject to a baseline measurement of Type I muscle fibers in the same subject.
  • the amount of Type I muscle fibers is measured by using myosin ATPase staining of muscle samples.
  • reducing the rate of loss of Type I muscle fibers in the subject comprises a return to the subject's baseline measurement of Type I muscle fibers faster than the control following a period of disuse.
  • the loss of Type I muscle fibers in the subject is less than the loss of Type I muscle fibers relative to the control during a period of disuse.
  • reducing disuse-associated muscle atrophy comprises reducing the rate of decrease in mitochondrial biogenesis in a muscle tissue of the subject relative to a control, wherein the rate of decrease in mitochondrial biogenesis comprises a comparison of one or more measurements of mitochondrial biogenesis in the subject to a baseline measurement of mitochondrial biogenesis in the same subject.
  • reducing the rate of decrease in mitochondrial biogenesis in the subject comprises a return to the subject's baseline measurement of mitochondrial biogenesis faster than the control following a period of disuse.
  • the decrease in mitochondrial biogenesis in the subject is less than the decrease in mitochondrial biogenesis relative to the control during a period of disuse.
  • the methods of the present invention for reducing disuse-associated muscle atrophy comprise administration of a PPAR ⁇ agonist to a subject in need thereof before, during, or after a period of disuse, or any combination thereof.
  • FIG. 1 shows a graph of mean changes from baseline in muscle strength representing the effect of administration of a PPAR ⁇ agonist on performance of a repeated measures knee extension strength test during (day 0 to day 14) and after (day 14 to day 21 and day 21 to day 29) limb immobilization in human subjects. Data reflects multiple imputation for missing and invalid data.
  • FIG. 2 shows a graph of mean changes from baseline in muscle strength representing the effect of administration of a PPAR ⁇ agonist on performance of a repeated measures knee extension strength test during (day 0 to day 14) and after (day 14 to day 21 and day 21 to day 29) limb immobilization in human subjects.
  • Data reflects all available data for subjects with valid data, excluding protocol violators (i.e., no imputation for missing and invalid data).
  • the PPAR ⁇ agonist compounds of the present invention are useful in treating muscle atrophy in a subject in need thereof.
  • PPAR ⁇ is the most abundant PPAR isoform in skeletal muscle and has a higher expression in oxidative type I muscle fibers compared with glycolytic type II muscle fibers (Wang et al., PLoS Biol. 2:e294 (2004)). Both short-term exercise and endurance training lead to increased PPAR ⁇ expression in human and rodent skeletal muscle (Watt et al., J. Mol. Endocrinol. 33:533-544 (2004); Mahoney et al., FASEB J. 19:1498-1500 (2005); Russell et al., Diabetes 52:2874-2881 (2003); and Fritz et al., Diabetes Metab. Res. Rev. 2:492-498 (2006)).
  • the present invention is generally directed to methods of treating muscle atrophy in a subject in need thereof comprising administering to the subject an effective amount of a PPAR ⁇ agonist.
  • a muscle is a soft tissue found in most animals comprising muscle cells. Muscle cells contain protein filaments that can slide past one another and produce a contraction that changes both the length and shape of the muscle cell. Muscles function to produce force and motion. There are three types of muscles in the body: a) skeletal muscle (the muscle responsible for moving extremities and external areas of the bodies); b) cardiac muscle (the heart muscle); and c) smooth muscle (the muscle that is in the walls of arteries and bowel).
  • muscle cell refers to any cell that contributes to muscle tissue.
  • Myoblasts, satellite cells, myotubes, and myofibril tissues are all included in the term “muscle cells” and may all be treated using the methods of the invention. Muscle cell effects may be induced within skeletal, cardiac, and smooth muscles.
  • Skeletal muscle or voluntary muscle, is generally anchored by tendons to bone and is generally used to effect skeletal movement such as locomotion or in maintaining posture. Although some control of skeletal muscle is generally maintained as an unconscious reflex (e.g., postural muscles or the diaphragm), skeletal muscles react to conscious control. Smooth muscle, or involuntary muscle, is found within the walls of organs and structures such as the esophagus, stomach, intestines, uterus, urethra, and blood vessels. Unlike skeletal muscle, smooth muscle is not under conscious control. Cardiac muscle is also an involuntary muscle but more closely resembles skeletal muscle in structure and is found only in the heart.
  • Cardiac and skeletal muscles are striated in that they contain sarcomeres that are packed into highly regular arrangements of bundles.
  • the myofibrils of smooth muscle cells are not arranged in sarcomeres and therefore are not striated.
  • Type I muscle fibers are dense with capillaries and are rich in mitochondria and myoglobin, which gives Type I muscle tissue a characteristic red color. Type I muscle fibers can carry more oxygen and sustain aerobic activity using fats or carbohydrates for fuel. Type I muscle fibers contract for long periods of time but with little force. Type II muscle fibers may be subdivided into three major subtypes (IIa, IIx, and IIb) that vary in both contractile speed and force generated. Type II muscle fibers contract quickly and powerfully but fatigue very rapidly, and therefore produce only short, anaerobic bursts of activity before muscle contraction becomes painful.
  • IIa, IIx, and IIb major subtypes
  • Muscle atrophy refers to a loss of muscle mass and/or to a progressive weakening and degeneration of muscles.
  • the loss of muscle mass and/or the progressive weakening and degeneration of muscles can occur because of an unusually high rate of protein degradation, an unusually low rate of protein synthesis, or a combination of both.
  • An unusually high rate of muscle protein degradation can occur due to muscle protein catabolism (i.e., the breakdown of muscle protein in order to use amino acids as substrates for gluconeogenesis).
  • muscle atrophy refers to significant loss in muscle strength.
  • significant loss in muscle strength is meant a reduction of strength in diseased, injured, or unused muscle tissue in a subject relative to the same muscle tissue in a control subject.
  • a significant loss in muscle strength may be a reduction in strength of at least 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45%, at least 50%, or more relative to the same muscle tissue in a control subject.
  • by significant loss in muscle strength is meant a reduction of strength in unused muscle tissue relative to the muscle strength of the same muscle tissue in the same subject prior to a period of nonuse.
  • a significant loss in muscle strength may be a reduction of at least 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45%, at least 50%, or more relative to the muscle strength of the same muscle tissue in the same subject prior to a period of nonuse.
  • Muscle strength may be measured by a muscle strength test (see, e.g., Muscle Strength Test methods as described in the Examples below).
  • muscle atrophy refers to significant loss in muscle mass.
  • significant loss in muscle mass is meant a reduction of muscle volume in diseased, injured, or unused muscle tissue in a subject relative to the same muscle tissue in a control subject.
  • a significant loss of muscle volume may be at least 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45%, at least 50%, or more relative to the same muscle tissue in a control subject.
  • by significant loss in muscle mass is meant a reduction of muscle volume in unused muscle tissue relative to the muscle volume of the same muscle tissue in the same subject prior to a period of nonuse.
  • a significant loss in muscle tissue may be at least 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45%, at least 50%, or more relative to the muscle volume of the same muscle tissue in the same subject prior to a period of nonuse.
  • Muscle volume may be measured by evaluating the cross-section area of a muscle such as by Magnetic Resonance Imaging (MRI; see, e.g., muscle volume/cross-section area (CSA) MRI methods as described in the Examples below).
  • MRI Magnetic Resonance Imaging
  • CSA muscle volume/cross-section area
  • a limb is immobilized (e.g., due to a limb or joint fracture or an orthopedic surgery such as a hip or knee replacement surgery).
  • immobilization or “immobilized” refers to the partial or complete restriction of movement of limbs, muscles, bones, tendons, joints, or any other body parts for an extended period of time (e.g., for 2 days, 3 days, 4 days, 5 days, 6 days, a week, two weeks, or more).
  • a period of immobilization may include short periods or instances of unrestrained movement, such as to bathe, to replace an external device, or to adjust an external device.
  • Limb immobilization may be carried out by any variety of external devices including, but not limited to, braces, slings, casts, bandages, and splints (any of which may be composed of hard or soft material including but not limited to cloth, gauze, fiberglass, plastic, plaster, or metal), as well as any variety of internal devices including surgically implanted splints, plates, braces, and the like.
  • external devices including, but not limited to, braces, slings, casts, bandages, and splints (any of which may be composed of hard or soft material including but not limited to cloth, gauze, fiberglass, plastic, plaster, or metal), as well as any variety of internal devices including surgically implanted splints, plates, braces, and the like.
  • the restriction of movement may involve a single joint or multiple joints (e.g., simple joints such as the shoulder joint or hip joint, compound joints such as the radiocarpal joint, and complex joints such as the knee joint, including but not limited to one or more of the following: articulations of the hand, shoulder joints, elbow joints, wrist joints, auxiliary articulations, sternoclavicular joints, vertebral articulations, temporomandibular joints, sacroiliac joints, hip joints, knee joints, and articulations of the foot), a single tendon or ligament or multiple tendons or ligaments (e.g., including but not limited to one or more of the following: the anterior cruciate ligament, the posterior cruciate ligament, rotator cuff tendons, medial collateral ligaments of the elbow and knee, flexor tendons of the hand, lateral ligaments of the ankle, and tendons and ligaments of the jaw or temporomandibular joint), a single bone or multiple bones (e.g., including
  • Disuse-associated muscle atrophy can also result when the use of a limb is reduced (e.g., due to joint pain associated with rheumatoid arthritis or injury), or due to a prolonged period of inactivity due to illness, bed rest, or a debilitative state.
  • Disuse-associated muscle atrophy can also result from the use of mechanical ventilation by a subject. Even though mechanical ventilation is a life-saving measure for subjects with respiratory failure, complications associated with weaning patients from mechanical ventilation are common, in particular due to respiratory muscle weakness of the diaphragm, a skeletal muscle.
  • the present invention is directed to a method for reducing disuse-associated muscle atrophy in a subject in need thereof comprising administering to the subject an effective amount of a PPAR ⁇ agonist.
  • the disuse-associated muscle atrophy is caused by limb immobilization in the subject.
  • the disuse-associated muscle atrophy is caused by use of a mechanical ventilator by the subject.
  • reducing disuse-associated muscle atrophy comprises reducing the rate of loss of muscle strength in a muscle tissue of the subject relative to a control, wherein the rate of loss of muscle strength comprises a comparison of one or more measurements of muscle strength in the subject to a baseline measurement of muscle strength in the same subject, wherein muscle strength is measured by a muscle strength test (see, e.g., Muscle Strength Test methods as described in the Examples below).
  • reducing the rate of loss of muscle strength in the subject comprises a return to the subject's baseline measurement of muscle strength faster than the control following a period of disuse.
  • reducing the rate of loss of muscle strength in the subject comprises a return to the subject's baseline measurement of muscle strength following a period of disuse in less than 95%, or less than 90%, or less than 85%, or less than 80%, or less than 75%, or less than 70%, or less than 65%, or less than 60%, or less than 55%, or less than 50% of the time to return to baseline for a control.
  • the loss of muscle strength in the subject is less than the loss of muscle strength relative to the control.
  • the loss of muscle strength in the subject comprises less than a 50%, less than a 45%, less than a 40%, less than a 35%, less than a 30%, less than a 25%, less than a 20%, less than a 15%, less than a 10%, less than a 9%, less than an 8%, less than a 7%, less than a 6%, less than a 5%, less than a 4%, less than a 3%, less than a 2%, less than a 1%, or a 0% loss of muscle strength relative to the subject's baseline measurement of muscle strength prior to a period of disuse.
  • reducing disuse-associated muscle atrophy comprises reducing the rate of loss of muscle mass in a muscle tissue of the subject relative to a control, wherein the rate of loss of muscle mass comprises a comparison of one or more measurements of muscle volume in the subject to a baseline measurement of muscle volume in the same subject, wherein muscle volume is measured by the cross-section area of a muscle (such as by Magnetic Resonance Imaging [MRI]; see, e.g., muscle volume/cross-section area [CSA] MRI methods as described in the Examples below).
  • MRI Magnetic Resonance Imaging
  • CSA muscle volume/cross-section area
  • reducing the rate of loss of muscle mass in the subject comprises a return to the subject's baseline measurement of muscle mass following a period of disuse in less than 95%, or less than 90%, or less than 85%, or less than 80%, or less than 75%, or less than 70%, or less than 65%, or less than 60%, or less than 55%, or less than 50% of the time to return to baseline for a control.
  • the loss of muscle mass in the subject is less than the loss of muscle mass relative to the control.
  • the loss of muscle mass in the subject comprises less than a 50%, less than a 45%, less than a 40%, less than a 35%, less than a 30%, less than a 25%, less than a 20%, less than a 15%, less than a 10%, less than a 9%, less than an 8%, less than a 7%, less than a 6%, less than a 5%, less than a 4%, less than a 3%, less than a 2%, less than a 1%, or a 0% loss of muscle mass relative to the subject's baseline measurement of muscle mass prior to a period of disuse.
  • reducing disuse-associated muscle atrophy comprises reducing the rate of loss of Type I muscle fibers in a muscle tissue of the subject relative to a control, wherein the rate of loss of Type I muscle fibers comprises a comparison of one or more measurements of Type I muscle fibers in the subject to a baseline measurement of Type I muscle fibers in the same subject, wherein Type I muscle fibers is measured by using myosin ATPase staining.
  • reducing the rate of loss of Type I muscle fibers in the subject comprises a return to the subject's baseline measurement of Type I muscle fibers faster than the control.
  • reducing the rate of loss of Type I muscle fibers in the subject comprises a return to the subject's baseline measurement of Type I muscle fibers following a period of disuse in less than 95%, or less than 90%, or less than 85%, or less than 80%, or less than 75%, or less than 70%, or less than 65%, or less than 60%, or less than 55%, or less than 50% of the time to return to baseline for a control.
  • the loss of Type I muscle fibers in the subject is less than the loss of Type I muscle fibers relative to the control.
  • the loss of Type I muscle fibers in the subject comprises less than a 50%, less than a 45%, less than a 40%, less than a 35%, less than a 30%, less than a 25%, less than a 20%, less than a 15%, less than a 10%, less than a 9%, less than an 8%, less than a 7%, less than a 6%, less than a 5%, less than a 4%, less than a 3%, less than a 2%, less than a 1%, or a 0% loss of Type I muscle fibers relative to the subject's baseline measurement of Type I muscle fibers prior to a period of disuse.
  • Type I muscle fibers Procedures for measuring Type I muscle fibers are described in N. Yasuda et al. J Appl Physiol 99: 1085-1092 (2005).
  • muscle specimens may be dissected of visible fat and connective tissue and placed into optimum cutting temperature embedding medium (OCT Tissue-Tek) with the orientation of the fibers perpendicular to the horizontal plane.
  • OCT Tissue-Tek optimum cutting temperature embedding medium
  • the samples may be quickly frozen in isopentane, cooled by liquid nitrogen, and stored at ⁇ 80° C. until subsequent histochemical analysis.
  • the OCT-mounted muscle samples may be serially sectioned to 10- ⁇ m thickness, and Type I, IIa, and IIx muscle fibers may be determined by using myosin ATPase staining.
  • reducing disuse-associated muscle atrophy comprises reducing the rate of decrease in mitochondrial biogenesis in a muscle tissue of the subject relative to a control, wherein the rate of decrease in mitochondrial biogenesis comprises a comparison of one or more measurements of mitochondrial biogenesis in the subject to a baseline measurement of mitochondrial biogenesis in the same subject.
  • reducing the rate of decrease in mitochondrial biogenesis in the subject comprises a return to the subject's baseline measurement of mitochondrial biogenesis faster than the control.
  • reducing the rate of decrease in mitochondrial biogenesis in the subject comprises a return to the subject's baseline measurement of mitochondrial biogenesis following a period of disuse in less than 95%, or less than 90%, or less than 85%, or less than 80%, or less than 75%, or less than 70%, or less than 65%, or less than 60%, or less than 55%, or less than 50% of the time to return to baseline for a control.
  • the decrease in mitochondrial biogenesis in the subject is less than the decrease in mitochondrial biogenesis relative to the control.
  • the decrease in mitochondrial biogenesis in the subject comprises less than a 50%, less than a 45%, less than a 40%, less than a 35%, less than a 30%, less than a 25%, less than a 20%, less than a 15%, less than a 10%, less than a 9%, less than an 8%, less than a 7%, less than a 6%, less than a 5%, less than a 4%, less than a 3%, less than a 2%, less than a 1%, or a 0% decrease in mitochondrial biogenesis relative to the subject's baseline measurement of mitochondrial biogenesis prior to a period of disuse.
  • Mitochondrial biogenesis is measured by mitochondrial mass and volume through histological section staining using a fluorescently labeled antibody specific to the oxidative-phosphorylation complexes, such as the Anti-OxPhox Complex Vd subunit antibody from Life Technologies or using mitochondrial specific dyes in live cell staining, such as the Mito-tracker probes from Life Technologies.
  • Mitochondrial biogenesis can also be measured by monitoring the gene expression of one or more mitochondrial biogenesis related transcription factors such as PGC1a, NRF1, or NRF2 using a technique such as QPCR.
  • the method of the invention comprises a method for treating muscle atrophy caused by time spent in a zero gravity, reduced gravity, or perceived zero gravity environment in a subject in need thereof comprising administering to the subject an effective amount of a PPAR ⁇ agonist.
  • Muscle atrophy can also be associated with disease.
  • Disease-associated muscle atrophy is less common than disuse-associated muscle atrophy and can result from diseases that either affect the nerves that supply individual muscles (i.e., neurogenic atrophy) or from diseases intrinsic to muscle tissue (i.e., muscle disease).
  • the nerve supply to the muscle can be interrupted or compromised by compression, injury, or disease within the nerve cells, resulting in a temporary or permanent nerve deficit.
  • Diseases within nerve cells that can interrupt or compromise nerve supply to muscles include, for example, multiple sclerosis, amyotrophic lateral sclerosis (ALS, or Lou Gehrig's disease), Guillain-Barré syndrome, stroke, and viral infection of nerve cells (e.g., poliomyelitis).
  • Muscle diseases can be intrinsic to muscle tissue (e.g., muscular dystrophy, polymyositis, or myotonia) or can occur as a response to systemic illness (e.g., hypo- or hyperthyroidism, adrenal gland depletion, diabetes mellitus, or autoimmune diseases).
  • Sarcopenia is a debilitating disease that afflicts the elderly and is characterized by loss of muscle mass and function with advanced age.
  • Generalized muscle wasting can also occur as a secondary consequence of such diseases as advanced cancer, Acquired Immune Deficiency Syndrome (AIDS), chronic obstructive lung disease, congestive heart failure, cardiomyopathy, chronic liver disease, renal disease, emphysema, tuberculosis, osteomalacia, hormonal deficiency, anorexia nervosa, generalized malnutrition, and drug abuse (e.g., abuse of alcohol, opiates, or steroids).
  • AIDS Acquired Immune Deficiency Syndrome
  • the present invention provides methods to inhibit muscle atrophy and/or to increase muscle mass by providing to a subject in need thereof an effective amount of PPAR ⁇ agonist compound, and pharmaceutical compositions comprising compounds used in the methods.
  • the present invention provides methods to modulate muscle growth, or to increase muscle strength, or to maintain muscle strength, or to reduce loss of muscle strength, or to induce skeletal muscle hypertrophy, or to enhance tissue growth in vitro or in vivo, or to enhance muscle formation, and pharmaceutical compositions comprising compounds used in these methods.
  • a PPAR ⁇ agonist compound is administered or used.
  • the present invention provides a kit comprising at least one PPAR ⁇ agonist compound and one or more of: (a) a protein supplement; (b) an anabolic agent; (c) a catabolic agent; (d) a dietary supplement; (e) at least one agent known to treat a disorder associated with muscle wasting; (f) instructions for treating a disorder associated with cholinergic activity; or (g) instructions for using the compound to increase muscle mass and/or muscular strength.
  • the kits can also comprise compounds and/or products co-packaged, co-formulated, and/or co-delivered with other components.
  • kits comprising a PPAR ⁇ agonist compound and/or product and another component for delivery to a patient. It is contemplated that the disclosed kits can be used in connection with the disclosed methods of making, the disclosed methods of using, and/or the disclosed compositions.
  • a PPAR ⁇ agonist compound may be used in the treatment of muscle disorders.
  • the muscle disorder can be skeletal muscle atrophy secondary to malnutrition, muscle disuse (secondary to voluntary or involuntary bed rest), neurologic disease (including multiple sclerosis, amyotrophic lateral sclerosis, spinal muscular atrophy, critical illness neuropathy, spinal cord injury or peripheral nerve injury), orthopedic injury, casting, and other post-surgical forms of limb immobilization, chronic disease (including cancer, congestive heart failure, chronic pulmonary disease, chronic renal failure, chronic liver disease, diabetes mellitus, Cushing syndrome, and chronic infections such as HIV/AIDS or tuberculosis), burns, sepsis, other illnesses requiring mechanical ventilation, drug-induced muscle disease (such as glucorticoid-induced myopathy and statin-induced myopathy), genetic diseases that primarily affect skeletal muscle (such as muscular dystrophy and myotonic dystrophy), autoimmune diseases that affect skeletal muscle (such as polymyositis and dermatomyosit
  • the present invention provides a method of treating acute respiratory distress syndrome (ARDS) in a subject comprising administering to a subject a PPAR ⁇ agonist compound in an effective amount.
  • ARDS acute respiratory distress syndrome
  • the subject is on a mechanical ventilator.
  • the method comprises reduction in muscle atrophy in the diaphragm.
  • the present invention provides a method of reducing the period to weaning from a mechanical ventilator comprising administering to a subject a PPAR ⁇ agonist compound in an effective amount.
  • the period to weaning is reduced by at least 1 hour, at least 2 hours, at least 3 hours, at least 4 hours, at least 8 hours, at least 16 hours, at least 24 hours, at least 32 hours, at least 40 hours, at least 48 hours, at least 56 hours, at least 64 hours, or at least 72 hours.
  • the decision to wean from a mechanical ventilator is evaluated using a manual muscle test (MMT) score.
  • An MMT proximal subscore (5 muscle groups) may be initially assessed (such as prior to administration of the PPAR ⁇ agonist) and every 3 ( ⁇ 1) days thereafter after the initial assessment until hospital discharge, including the day of discharge or the day before.
  • MMT may be scheduled during sedation holiday.
  • the MMT total score (12 muscle groups) may be performed one day after an order has been written for discharge from the ICU and every 7 ( ⁇ 1) days thereafter until hospital discharge.
  • the muscle groups that may be assessed are bilateral shoulder abduction, elbow flexion, wrist extension, hip flexion, knee extension, and foot dorsiflexion.
  • the muscle groups that may be assessed include any grouping of the following: Trapezius (shoulder elevators); Deltoid middle (shoulder abductors); Biceps brachii (elbow flexors); Wrist extensors; Wrist flexors; Iliopsoas (hip flexors); Quadriceps femoris (knee extensors); Ankle dorsiflexors; Neck flexors; Gluteus minims (hip abductors); Neck extensors; Gluteus maximus (hip extensors); Hamstrings (knee flexors); and Ankle plantar flexors; including any group of 12.
  • the subject may be positioned in either the sitting or supine position, depending on the patient's clinical situation.
  • Strength in each muscle group will be scored according to the six point MRC system, in which a score of 0 is no contraction; 1 is a flicker of contraction; 2 is active movement with gravity eliminated; 3 is active movement against gravity; 4 is active movement against gravity and resistance; and 5 is normal power.
  • Proximal muscle strength an outcome measure, may be scored as the mean of the scores for bilateral shoulder abduction and bilateral hip flexion, and may be referred to as the MMT proximal subscore.
  • the present invention provides a method of decreasing the rate of lowering a patient's MMT score (or subscore) wherein the subject is subject to mechanical ventilation, of maintaining a subject's MMT score (or subscore), or increasing a subject's MMT score (or subscore), where the patient is subject to mechanical ventilation, comprising administering to a subject a PPAR ⁇ agonist compound in an effective amount.
  • the subject's MMT subscore for bilateral shoulder abduction and bilateral hip flexion is 6 or greater before weaning from mechanical ventilation.
  • the present invention provides a method of increasing the days free of mechanical ventilation for a subject on mechanical ventilation. In an embodiment, the number of days free is out of 28 days. In another embodiment, the present invention provides a method of increasing the number of hospital free days of a subject on mechanical ventilation. In an embodiment, the number of hospital free days is out of 28 days.
  • a method for increasing muscle mass comprising administering to a subject a PPAR ⁇ agonist compound in an amount effective to increase the subject's muscle mass.
  • the subject is a mammal.
  • the mammal is a primate.
  • the mammal is a human.
  • the subject is a domesticated animal.
  • the domesticated animal is poultry.
  • the poultry is selected from chicken, turkey, duck, and goose.
  • the domesticated animal is livestock.
  • the livestock animal is selected from pig, cow, horse, goat, bison, and sheep.
  • the present invention provides a method of enhancing tissue or cell growth in vitro, the method comprising administering to the tissue or cells a PPAR ⁇ agonist compound in an amount effective to enhance growth of the tissue or cells.
  • the tissue comprises animal cells.
  • the animal cells are muscle cells.
  • the muscle cells are myosatellite cells.
  • any of the foregoing tissues or cells may be grown on a scaffold, bead, or other support matrix.
  • the present invention provides a tissue or cells grown in the presence of a PPAR ⁇ agonist compound.
  • the tissue or cells grown may be implanted in a subject from whom the tissue or cells were originally harvested.
  • the tissue or cells grown may be implanted in a subject different from the subject from whom the tissue or cells were originally harvested.
  • the present invention provides a method of enhancing tissue growth in vivo, the method comprising administering a PPAR ⁇ agonist compound in an amount effective to enhance growth of a tissue or cells following implantation of the tissue or cells into the subject.
  • the tissue comprises animal cells.
  • the animal cells are muscle cells.
  • the muscle cells are myosatellite cells.
  • any of the foregoing cells may be grown on a scaffold, bead, or other support matrix prior to implantation.
  • the tissue or cells are grown in the presence of a PPAR ⁇ agonist compound.
  • the tissue grown may be implanted in a subject from whom the tissue or cells were originally harvested.
  • the tissue grown may be implanted in a subject different from the subject from whom the tissue or cells were originally harvested.
  • the present invention provides uses of a PPAR ⁇ agonist compound as pharmacological tools in the development and standardization of in vitro and in vivo test systems for the evaluation of the effects of modulators of muscle hypertrophy or inhibitors of muscle atrophy related activity in laboratory animals such as cats, dogs, rabbits, monkeys, rats, and mice, as part of the search for new therapeutic agents to increase muscle mass and/or inhibit muscle hypertrophy.
  • a PPAR ⁇ agonist compound may be administered systemically, such as by parenteral injection or by oral consumption, and may be used to promote muscle growth and reduce muscle atrophy in all muscles, including those of the limbs and the diaphragm.
  • a PPAR ⁇ agonist compound may also be administered locally, such as by a topical route or localized injection, and may be used to promote local muscle growth, as can be required following a localized injury or surgery.
  • a PPAR ⁇ agonist compound is administered to a subject
  • the administration may be combined with a regime of physical therapy to inhibit muscle atrophy, or to increase muscle mass, or to inhibit loss of muscle strength, or to increase muscle strength, or to enhance muscle formation.
  • the method of the invention comprises a method for treating a disease associated with muscle atrophy in a subject in need thereof comprising administering to the subject an effective amount of a PPAR ⁇ agonist.
  • Muscle atrophy can also be associated with injury.
  • Injury-associated muscle atrophy can occur, for example, with severe burns and trauma, including, but not limited to, damage to the central nervous system (CNS) or peripheral nervous system (PNS), or exposure to toxic chemicals.
  • CNS central nervous system
  • PNS peripheral nervous system
  • the method of the invention comprises a method for treating injury-associated muscle atrophy in a subject in need thereof comprising administering to the subject an effective amount of a PPAR ⁇ agonist.
  • administer means to introduce, such as to introduce to a subject a compound(s) or composition.
  • the term is not limited to any specific mode of delivery, and can include, but is not limited to, transdermal and oral delivery.
  • treat or “treating” or “treatment” can refer to one or more of: delaying the progress of a disorder; controlling a disorder; delaying the onset of a disorder; ameliorating one or more symptoms characteristic of a disorder; or delaying the recurrence of a disorder, or characteristic symptoms thereof, depending on the nature of the disorder and its characteristic symptoms.
  • muscle atrophy may be predicted in a subject, for example, in the context of muscle atrophy caused by limb immobilization or caused by use of a mechanical ventilator by a subject.
  • treatment may be initiated prior to the condition predicted to cause muscle atrophy.
  • treatment of a subject with an effective amount of a PPAR ⁇ agonist may be initiated immediately before the condition predicted to cause muscle atrophy (e.g, immediately before limb immobilization or use of a mechanical ventilator).
  • treatment of a subject with an effective amount of a PPAR ⁇ agonist may be initiated at least 1 hour, at least 2 hours, at least 3 hours, at least 4 hours, at least 8 hours, at least 16 hours, at least 24 hours, at least 32 hours, at least 40 hours, at least 48 hours, at least 56 hours, at least 64 hours, or at least 72 hours before the condition predicted to cause muscle atrophy (e.g, immediately before limb immobilization or use of a mechanical ventilator).
  • the methods of the present invention for reducing disuse-associated muscle atrophy comprise administration of a PPAR ⁇ agonist to a subject in need thereof during a period of disuse.
  • the methods of the present invention for reducing disuse-associated muscle atrophy comprise administration of a PPAR ⁇ agonist to a subject in need thereof before a period of disuse.
  • the methods of the present invention for reducing disuse-associated muscle atrophy comprise administration of a PPAR ⁇ agonist to a subject in need thereof after a period of disuse.
  • the methods of the present invention for reducing disuse-associated muscle atrophy comprise administration of a PPAR ⁇ agonist to a subject in need thereof before, during, or after a period of disuse, or any combination thereof.
  • diagnosing and assessing the severity of the condition and/or effectiveness of prevention or treatment is ultimately left to the subject and/or attending physician.
  • a number of tools are available for assessing the severity of the condition and/or effectiveness of prevention or treatment, as described elsewhere herein.
  • subject generally refers to a human, but also may include other mammals such as horses, cows, sheep, pigs, mice, rats, dogs, cats, and primates.
  • the subject is a human.
  • the subject is a mammal who exhibits one or more symptoms characteristic of a disorder.
  • the subject is a human who exhibits one or more symptoms characteristic of a disorder.
  • the term subject does not require one to have any particular status or relationship with respect to a hospital, clinic, research facility, or physician (e.g., as an admitted patient, a study participant, or the like).
  • a suitable dose of a PPAR ⁇ agonist, or a pharmaceutically acceptable salt thereof, for administration to a human will be in the range of about 0.1 mg/kg per day to about 25 mg/kg per day (e.g., about 0.2 mg/kg per day, about 0.3 mg/kg per day, about 0.4 mg/kg per day, about 0.5 mg/kg per day, about 0.6 mg/kg per day, about 0.7 mg/kg per day, about 0.8 mg/kg per day, about 0.9 mg/kg per day, about 1 mg/kg per day, about 2 mg/kg per day, about 3 mg/kg per day, about 4 mg/kg per day, about 5 mg/kg per day, about 6 mg/kg per day, about 7 mg/kg per day, about 8 mg/kg per day, about 9 mg/kg per day, about 10 mg/kg per day, about 15 mg/kg per day, about 20
  • a suitable dose of a PPAR ⁇ agonist, or a pharmaceutically acceptable salt thereof, for administration to a human will be in the range of from about 0.1 mg/day to about 1000 mg/day; from about 1 mg/day to about 400 mg/day; or from about 1 mg/day to about 300 mg/day.
  • a suitable dose of a PPAR ⁇ agonist, or a pharmaceutically acceptable salt thereof, for administration to a human will be about 1 mg/day, about 2 mg/day, about 3 mg/day, about 4 mg/day, about 5 mg/day, about 6 mg/day, about 7 mg/day, about 8 mg/day, about 9 mg/day, about 10 mg/day, about 15 mg/day, about 20 mg/day, about 25 mg/day, about 30 mg/day, about 35 mg/day, about 40 mg/day, about 45 mg/day, about 50 mg/day, about 55 mg/day, about 60 mg/day, about 65 mg/day, about 70 mg/day, about 75 mg/day, about 80 mg/day, about 85 mg/day, about 90 mg/day, about 95 mg/day, about 100 mg/day, about 125 mg/day, about 150 mg/day, about 175 mg/day, about 200 mg/day, about 225 mg/day, about 250 mg/day, about 275 mg/day, about 300 mg/day
  • Dosages may be administered more than one time per day (e.g., two, three, four, or more times per day).
  • a suitable dose of a PPAR ⁇ agonist, or a pharmaceutically acceptable salt thereof, for administration to a human is about 100 mg twice/day (i.e., a total of about 200 mg/day).
  • a suitable dose of a PPAR ⁇ agonist, or a pharmaceutically acceptable salt thereof, for administration to a human is about 50 mg twice/day (i.e., a total of about 100 mg/day).
  • PPAR ⁇ agonist is administered in a therapeutically effective amount to a subject (e.g., a human).
  • a subject e.g., a human
  • the term “effective amount” or “therapeutically effective amount” refers to an amount of an active ingredient that elicits the desired biological or medicinal response, for example, reduction or alleviation of the symptoms of the condition being treated.
  • the amount of PPAR ⁇ agonist administered can vary depending on various factors, including, but not limited to, the weight of the subject, the nature and/or extent of the subject's condition, etc.
  • a peroxisome proliferator activated receptor-delta (PPAR ⁇ ) agonist is a fatty acid, lipid, protein, peptide, small molecule, or other chemical entity that binds to the cellular PPAR ⁇ and elicits a downstream response, namely gene transcription, either native gene transcription or a reporter construct gene transcription, comparable to endogenous ligands such as retinoic acid or comparable to a standard reference PPAR ⁇ agonist such as carbacyclin.
  • a PPAR ⁇ agonist is a selective agonist.
  • a selective PPAR ⁇ agonist is viewed as a chemical entity that binds to and activates the cellular PPAR ⁇ and does not substantially activate the cellular peroxisome proliferator activated receptors-alpha (PPAR ⁇ ) and -gamma (PPAR ⁇ ).
  • a selective PPAR ⁇ agonist is a chemical entity that has at least a 10-fold maximum activation (as compared to endogenous receptor ligand) with a greater than 100-fold potency for activation of PPAR ⁇ relative to either or both of PPAR ⁇ and PPAR ⁇ .
  • a selective PPAR ⁇ agonist is a chemical entity that binds to and activates the cellular human PPAR ⁇ and does not substantially activate either or both of human PPAR ⁇ and PPAR ⁇ .
  • a selective PPAR ⁇ agonist is a chemical entity that has at least a 10 fold, or a 20 fold, or a 30 fold, or a 40 fold, or a 50 fold, or a 100 fold potency for activation of PPAR ⁇ relative to either or both of PPAR ⁇ and PPAR ⁇ .
  • Activation here is defined as the abovementioned downstream response, which in the case of PPAR's is gene transcription. Gene transcription may be measured indirectly as downstream production of proteins reflective of the activation of the particular PPAR subtype under study.
  • an artificial reporter construct may be employed to study the activation of the individual PPAR's expressed in cells.
  • the ligand binding domain of the particular receptor to be studied may be fused to the DNA binding domain of a transcription factor, which produces convenient laboratory readouts, such as the yeast GAL4 transcription factor DNA binding domain.
  • the fusion protein may be transfected into a laboratory cell line along with a Gal4 enhancer, which effects the expression of the luciferase protein. When such a system is transfected into a laboratory cell line, binding of a receptor agonist to the fusion protein will result in light emission.
  • a selective PPAR ⁇ agonist may exemplify the above gene transcription profile in cells selectively expressing PPAR ⁇ , and not in cells selectively expressing PPAR ⁇ or PPAR ⁇ .
  • the cells may be expressing human PPAR ⁇ , PPAR ⁇ , and PPAR ⁇ , respectively.
  • a PPAR ⁇ agonist may have an EC50 value of less than 5 ⁇ m as determined by the PPAR transient transactivation assay described below. In an embodiment, the EC50 value is less than 1 ⁇ m. In another embodiment, the EC50 value is less than 500 nM. In another embodiment, the EC50 value is less than 100 nM. In another embodiment, the EC50 value is less than 50 nM.
  • the PPAR transient transactivation assay may be based on transient transfection into human HEK293 cells of two plasmids encoding a chimeric test protein and a reporter protein respectively.
  • the chimeric test protein may be a fusion of the DNA binding domain (DBD) from the yeast GAL4 transcription factor to the ligand binding domain (LBD) of the human PPAR proteins.
  • the PPAR-LBD moiety harbored in addition to the ligand binding pocket also has the native activation domain, allowing the fusion protein to function as a PPAR ligand dependent transcription factor.
  • the GAL4 DBD will direct the chimeric protein to bind only to Gal4 enhancers (of which none existed in HEK293 cells).
  • the reporter plasmid contained a Gal4 enhancer driving the expression of the firefly luciferase protein.
  • HEK293 cells expressed the GAL4-DBD-PPAR-LBD fusion protein.
  • the fusion protein will in turn bind to the Gal4 enhancer controlling the luciferase expression, and do nothing in the absence of ligand.
  • luciferase protein Upon addition to the cells of a PPAR ligand, luciferase protein will be produced in amounts corresponding to the activation of the PPAR protein. The amount of luciferase protein is measured by light emission after addition of the appropriate substrate.
  • HEK293 cells may be grown in DMEM+10% FCS. Cells may be seeded in 96-well plates the day before transfection to give a confluency of 50-80% at transfection. A total of 0.8 mg DNA containing 0.64 mg pM1a/gLBD, 0.1 mg pCMVbGal, 0.08 mg pGL2(Gal4) 5 , and 0.02 mg pADVANTAGE may be transfected per well using FuGene transfection reagent according to the manufacturer's instructions. Cells may be allowed to express protein for 48 h followed by addition of compound.
  • Human PPAR ⁇ may be obtained by PCR amplification using cDNA synthesized by reverse transcription of mRNA from human liver, adipose tissue, and plancenta, respectively. Amplified cDNAs may be cloned into pCR2.1 and sequenced. The ligand binding domain (LBD) of each PPAR isoform may be generated by PCR (PPAR ⁇ : aa 128-C-terminus) and fused to the DNA binding domain (DBD) of the yeast transcription factor GAL4 by subcloning fragments in frame into the vector pM1 (Sadowski et al.
  • the reporter may be constructed by inserting an oligonucleotide encoding five repeats of the GAL4 recognition sequence (Webster et al. (1988), Nucleic Acids Res. 16, 8192) into the vector pGL2 promotor (Promega), generating the plasmid pGL2(GAL4) 5 .
  • pCMVbGal may be purchased from Clontech and pADVANTAGE may be purchased from Promega.
  • Compounds may be dissolved in DMSO and diluted 1:1000 upon addition to the cells. Compounds may be tested in quadruple in concentrations ranging from 0.001 to 300 ⁇ M. Cells may be treated with compound for 24 h followed by luciferase assay. Each compound may be tested in at least two separate experiments.
  • ⁇ -galactosidase assay may be performed using the LucLite kit according to the manufacturer's instructions (Packard Instruments). Light emission may be quantified by counting on a Packard LumiCounter. To measure ⁇ -galactosidase activity, 25 ml supernatant from each transfection lysate may be transferred to a new microplate. ⁇ -Galactosidase assays may be performed in the microwell plates using a kit from Promega and read in a Labsystems Ascent Multiscan reader. The ⁇ -galactosidase data may be used to normalize (transfection efficiency, cell growth, etc.) the luciferase data.
  • the activity of a compound may be calculated as fold induction compared to an untreated sample.
  • the efficacy (maximal activity) may be given as a relative activity compared to Wy14,643 for PPAR ⁇ , rosiglitazone for PPAR ⁇ , and carbacyclin for PPAR ⁇ .
  • the EC50 is the concentration giving 50% of maximal observed activity. EC50 values may be calculated via non-linear regression using GraphPad PRISM 3.02 (GraphPad Software, San Diego, Calif.).
  • a PPAR ⁇ agonist has a molecular weight of less than 1000 g/mol, or a molecular weight of less than 950 g/mol, or a molecular weight of less than 900 g/mol, or a molecular weight of less than 850 g/mol, or a molecular weight of less than 800 g/mol, or a molecular weight of less than 750 g/mol, or a molecular weight of less than 700 g/mol, or a molecular weight of less than 650 g/mol, or a molecular weight of less than 600 g/mol, or a molecular weight of less than 550 g/mol, or a molecular weight of less than 500 g/mol, or a molecular weight of less than 450 g/mol, or a molecular weight of less than 400 g/mol, or a molecular weight of less than 350 g/mol, or a molecular weight of less than
  • a PPAR ⁇ agonist has a molecular weight of greater than 200 g/mol, or a molecular weight of greater than 250 g/mol, or a molecular weight of greater than 250 g/mol, or a molecular weight of greater than 300 g/mol, or a molecular weight of greater than 350 g/mol, or a molecular weight of greater than 400 g/mol, or a molecular weight of greater than 450 g/mol, or a molecular weight of greater than 500 g/mol, or a molecular weight of greater than 550 g/mol, or a molecular weight of greater than 600 g/mol, or a molecular weight of greater than 650 g/mol, or a molecular weight of greater than 700 g/mol, or a molecular weight of greater than 750 g/mol, or a molecular weight of greater than 800 g/mol, or a molecular weight of greater than 850 g/
  • a PPAR ⁇ agonist may be a PPAR ⁇ agonist compound as disclosed in any of the following published patent applications: WO 97/027847, WO 97/027857, WO 97/028115, WO 97/028137, WO 97/028149, WO 98/027974, WO 99/004815, WO 2001/000603, WO 2001/025181, WO 2001/025226, WO 2001/034200, WO 2001/060807, WO 2001/079197, WO 2002/014291, WO 2002/028434, WO 2002/046154, WO 2002/050048, WO 2002/059098, WO 2002/062774, WO 2002/070011, WO 2002/076957, WO 2003/016291, WO 2003/024395, WO 2003/033493, WO 2003/035603, WO 2003/072100, WO 2003/074050, WO
  • a PPAR ⁇ agonist may be a compound selected from the group consisting of sodelglitazar; lobeglitazone; netoglitazone; and isaglitazone;
  • a PPAR ⁇ agonist is (Z)-[2-Methyl-4-[3-(4-methylphenyl)-3-[4-[3-(morpholin-4-yl)propynyl]phenyl]allyloxy]-phenoxy]acetic acid:
  • a PPAR ⁇ agonist is (E)-[2-Methyl-4-[3-[4-[3-(pyrazol-1-yl)prop-1-ynyl]phenyl]-3-(4-trifluoromethylphenyl)-allyloxy]phenoxy]acetic acid:
  • a PPAR ⁇ agonist is (E)-[4-[3-(4-Fluorophenyl)-3-[4-[3-(morpholin-4-yl)propynyl]phenyl]allyloxy]-2-methyl-phenoxy]acetic acid:
  • a PPAR ⁇ agonist is (E)-[2-Methyl-[4-[3-[4-[3-(morpholin-4-yl)propynyl]phenyl]-3-(4-trifluoromethylphenyl)allyloxy]-phenoxy]acetic acid:
  • a PPAR ⁇ agonist is (E)-[4-[3-(4-Chlorophenyl)-3-[4-[3-(morpholin-4-yl)propynyl]phenyl]allyloxy]-2-methyl-phenoxy]acetic acid:
  • a PPAR ⁇ agonist is (E)-[4-[3-(4-Chlorophenyl)-3-[4-[3-(morpholin-4-yl)propynyl]phenyl]allyloxy]-2-methylphenyl]-propionic acid:
  • a PPAR ⁇ agonist is ⁇ 4-[3-Isobutoxy-5-(3-morpholin-4-yl-prop-1-ynyl)-benzylsulfanyl]-2-methyl-phenoxy ⁇ -acetic acid:
  • a PPAR ⁇ agonist is ⁇ 4-[3-Isobutoxy-5-(3-morpholin-4-yl-prop-1-ynyl)-phenylsulfanyl]-2-methyl-phenoxy ⁇ -acetic acid:
  • a PPAR ⁇ agonist is ⁇ 4-[3,3-Bis-(4-bromo-phenyl)-allyloxy]-2-methyl-phenoxy ⁇ -acetic acid:
  • a PPAR ⁇ agonist may be a compound selected from the group consisting of:
  • a PPAR ⁇ agonist is (E)-[4-[3-(4-Fluorophenyl)-3-[4-[3-(morpholin-4-yl)propynyl]phenyl]allyloxy]-2-methyl-phenoxy]acetic acid or a pharmaceutically acceptable salt thereof.
  • the term “pharmaceutically acceptable salt” refers to salts of a free acid or a free base that are not biologically undesirable and are generally prepared by reacting the free base with a suitable organic or inorganic acid or by reacting the acid with a suitable organic or inorganic base.
  • the term may be used in reference to any compound of the present invention.
  • Representative salts include the following salts: Acetate, Benzenesulfonate, Benzoate, Bicarbonate, Bisulfate, Bitartrate, Borate, Bromide, Calcium Edetate, Camsylate, Carbonate, Chloride, Clavulanate, Citrate, Dihydrochloride, Edetate, Edisylate, Estolate, Esylate, Fumarate, Gluceptate, Gluconate, Glutamate, Glycollylarsanilate, Hexylresorcinate, Hydrabamine, Hydrobromide, Hydrochloride, Hydroxynaphthoate, Iodide, Isethionate, Lactate, Lactobionate, Laurate, Malate, Maleate, Mandelate, Mesylate, Methylbromide, Methylnitrate, Methylsulfate, Monopotassium Maleate, Mucate, Napsylate, Nitrate, N-methylglucamine, Oxalate, Pamoate (
  • an acidic substituent such as —COOH
  • an acidic substituent such as —COOH
  • an acidic substituent such as —COOH
  • an acidic salt such as hydrochloride, hydrobromide, phosphate, sulfate, trifluoroacetate, trichloroacetate, acetate, oxalate, maleate, pyruvate, malonate, succinate, citrate, tartarate, fumarate, mandelate, benzoate, cinnamate, methanesulfonate, ethanesulfonate, picrate, and the like, and include acids related to the pharmaceutically acceptable salts listed in Stephen M. Berge, et al., Journal of Pharmaceutical Sciences, Vol. 66(1), pp. 1-19 (1977).
  • a PPAR ⁇ agonist may be included within a pharmaceutical composition.
  • pharmaceutical composition refers to a liquid or solid composition, preferably solid (e.g., a granulated powder), that contains a pharmaceutically active ingredient (e.g., a PPAR ⁇ agonist) and at least a carrier, where none of the ingredients is generally biologically undesirable at the administered quantities.
  • compositions incorporating a PPAR ⁇ agonist may take any physical form that is pharmaceutically acceptable.
  • Pharmaceutical compositions for oral administration are particularly preferred.
  • an effective amount of a PPAR ⁇ agonist is incorporated.
  • the inert ingredients and manner of formulation of the pharmaceutical compositions of the invention are conventional. Known methods of formulation used in pharmaceutical science may be followed. All of the usual types of compositions are contemplated, including, but not limited to, tablets, chewable tablets, capsules, and solutions.
  • the amount of the PPAR ⁇ agonist is best defined as the effective amount, that is, the amount of the PPAR ⁇ agonist that provides the desired dose to the subject in need of such treatment.
  • the activity of the PPAR ⁇ agonists does not depend on the nature of the composition, so the compositions may be chosen and formulated solely for convenience and economy. Any of the PPAR ⁇ agonists as described herein
  • compositions may be formulated in any desired form of composition.
  • Capsules may be prepared by mixing the PPAR ⁇ agonist with a suitable diluent and filling the proper amount of the mixture in capsules.
  • suitable diluents include inert powdered substances such as starch of many different kinds, powdered cellulose, especially crystalline and microcrystalline cellulose, sugars such as fructose, mannitol and sucrose, grain flours and similar edible powders.
  • Tablets may be prepared by direct compression, by wet granulation, or by dry granulation. Their formulations usually incorporate diluents, binders, lubricants, and disintegrators, as well as the PPAR ⁇ agonist.
  • Typical diluents include, for example, various types of starch, lactose, mannitol, kaolin, calcium phosphate or sulfate, inorganic salts such as sodium chloride, and powdered sugar. Powdered cellulose derivatives are also useful.
  • Typical tablet binders are substances such as starch, gelatin, and sugars such as lactose, fructose, glucose, and the like. Natural and synthetic gums are also convenient, including acacia, alginates, methylcellulose, polyvinylpyrrolidine, and the like. Polyethylene glycol, ethylcellulose, and waxes can also serve as binders.
  • a lubricant in a tablet formulation may help prevent the tablet and punches from sticking in the die.
  • a lubricant can be chosen from such solids as talc, magnesium and calcium stearate, stearic acid, and hydrogenated vegetable oils.
  • Tablet disintegrators are substances that swell when wetted to break up the tablet and release the compound. They include starches, clays, celluloses, aligns, and gums. More particularly, corn and potato starches, methylcellulose, agar, bentonite, wood cellulose, powdered natural sponge, cation-exchange resins, alginic acid, guar gum, citrus pulp, and carboxymethylcellulose, for example, may be used, as well as sodium lauryl sulfate.
  • Enteric formulations are often used to protect an active ingredient from the strongly acidic contents of the stomach. Such formulations are created by coating a solid dosage form with a film of a polymer that is insoluble in acid environments, and soluble in basic environments. Exemplary films are cellulose acetate phthalate, polyvinyl acetate phthalate, hydroxypropyl methylcellulose phthalate, and hydroxypropyl methylcellulose acetate succinate.
  • Tablets are often coated with sugar as a flavor and sealant.
  • the PPAR ⁇ agonists may also be formulated as chewable tablets by using large amounts of pleasant-tasting substances such as mannitol in the formulation, as is now well-established practice.
  • Transdermal patches may be used.
  • a patch comprises a resinous composition in which the active compound(s) will dissolve, or partially dissolve, and is held in contact with the skin by a film that protects the composition.
  • Other, more complicated patch compositions are also in use, particularly those having a membrane pierced with innumerable pores through which the drugs are pumped by osmotic action.
  • compositions intended for oral use may be prepared according to any known method, and such compositions may contain one or more agents selected from the group consisting of sweetening agents, flavoring agents, coloring agents, and preserving agents in order to provide pharmaceutically elegant and palatable preparations. Tablets may contain the active ingredient in admixture with non-toxic pharmaceutically acceptable excipients that are suitable for the manufacture of tablets.
  • excipients may be for example, inert diluents, such as calcium carbonate, sodium carbonate, lactose, calcium phosphate, or sodium phosphate; granulating and disintegrating agents, for example, corn starch or alginic acid; binding agents, for example, starch, gelatin, or acacia; and lubricating agents, for example, magnesium stearate, stearic acid, or talc.
  • the tablets may be uncoated or they may be coated by known techniques to delay disintegration and absorption in the gastrointestinal tract and thereby provide a sustained action over a longer period.
  • a time delay material such as glyceryl monostearate or glyceryl distearate may be employed.
  • Subjects will be leg immobilized using a knee brace (30 degrees flexion on the left leg to allow driving) and will be provided with walking crutches such that there is no weight bearing on the immobilized leg.
  • Subjects will be enrolled and randomized to receive Compound 1 or placebo (both referenced as Study Drug in this protocol).
  • the study consists of five periods termed SCR (screening period, Day ⁇ 35 to ⁇ 3), BL (baseline period: Day ⁇ 1 to Day 1 [am]), IMM (limb immobilization and treatment with study drug, Day 1 [pm] to Day 14), TRE (treatment with study drug without limb immobilization, Day 15 to Day 29) and REC (no treatment recovery period, Day 29 to Day 42).
  • SCR screening period
  • Day ⁇ 35 to ⁇ 3 BL
  • IMM limb immobilization and treatment with study drug
  • Day 1 [pm] to Day 14 TRE
  • TRE treatment with study drug without limb immobilization, Day 15 to Day 29
  • REC no treatment recovery period
  • Baseline testing Day 1 [am] and testing on day 14 and 16 will be performed after subjects have been admitted to the Clinical Research Unit (CRU).
  • CRU Clinical Research Unit
  • On Day ⁇ 1 (before baseline testing), subjects will be admitted to the CRU in the evening after having been instructed to abstain from exercise, to ingest a standard weight-maintaining diet, and to avoid caffeine and alcohol for three days before being admitted to the CRU.
  • At 1900 h on Day ⁇ 1 they will consume a standardized meal and then fast (except for water) and rest in bed until the next morning.
  • 0730 h on Day 1 they will be asked to use the bathroom, shower, brush their teeth, and walk (approximately 500 steps).
  • subjects will undergo the testing procedures (including breakfast) described above.
  • subjects After completion of all testing procedures, subjects will receive lunch and will then be fitted with the knee brace. Subjects will stay at the CRU until evening Study Drug dosing time. The first dose of the study drug will be administered by the site staff on site around 1900 h and dinner will be provided immediately after dosing. Subjects will be discharged from the CRU with study drug supply and instructions for at home self-administration. Subjects will be encouraged to walk between 4,000 and 6,000 steps per day for the duration of the study (Day 1-Day 42) unless otherwise specified.
  • subjects After completion of all testing procedures subjects will return to the CRU, where they will receive lunch, a snack later in the afternoon, and a standardized dinner as described above at 1900 h. They will also be encouraged to take short walks to total 2000 steps ( ⁇ 250 steps) on day 14. On day 15, they will receive standardized meals the same as in Day 14 and will rest in a chair in the CRU except for 4 brief periods of walking approximately 500 steps each (2000 steps total ⁇ 250 steps for entire day). On day 16 (testing day), subjects will be asked to use the bathroom, shower, brush their teeth, and walk (approximately 500 steps) at 0730 h. At 0800 h, they will undergo the testing procedures (including breakfast) described above. After completion of all testing procedures, subjects will receive lunch and will be discharged from the CRU.
  • subjects On days 21, 29, and 42 ( ⁇ 1 day), subjects will be tested as outpatients in the CRU after having been instructed to consume a weight maintaining diet and no caffeine for at least 3 days before the study visit. They will arrive in the CRU before 0800 h after an overnight fast, blood sample should be collected around 0800 h, and the study drug should be administered right after. The standardized breakfast will be provided immediately after dosing (except for Day 42) and then testing undergone as described previously.
  • AEs Adverse events
  • ECG 12-lead electrocardiogram
  • Safety analyses will be based on the safety population, comprising all subjects who are randomized to a treatment group and subsequently receive study medication. Safety variables will be summarized using descriptive statistics (mean, standard deviation, median, range, and number of observations).
  • Trough PK of Compound lat 100 mg BID (twice daily) during 28 days of treatment. Blood samples for assessment of Compound 1plasma trough concentrations will be collected throughout the study. Pre-dose (t 0) blood draws for PK samples were taken within 10 minutes prior to dosing on Day 6, 14, 16, 21, and 29. Plasma samples collected from subjects receiving Compound 1 were analyzed for Compound 1 concentrations using a previously developed and validated bioanalytical method.
  • PK analyses will be based on the PK population, comprising all subjects who received Compound 1. All derived PK parameters, and plasma Compound 1 concentrations at each scheduled assessment time point, will be summarized with descriptive statistics (arithmetic and geometric mean, standard deviation, coefficient of variation, median, range, and number of observations). Graphical displays of individual subject and mean plasma Compound 1 concentrations across time will also be generated.
  • PD parameters will be assessed at baseline (Day 1 [am]), Day 14, Day 16, Day 21, Day 29, and Day 42 to measure the changes from baseline to Day 14, from Day 14 to Day 16, from Day 14 to Day 21, from Day 14 to Day 29, and from Day 14 to Day 42.
  • PD parameters will be: 1) Muscle Strength Test (MST); 2) Physical Performance Test (PPT); 3) muscle cross section area (CSA) measurement (via Magnetic Resonance Imaging [MRI]); and 4) muscle tissue biomarker measurement (muscle biopsy).
  • Biomarkers evaluated from muscle tissue were: 1) Gene Expression Analysis (Global Gene Array); 2) PCG-1 ⁇ downstream gene profile; 3) Micro RNA; 4) Protein Content (phospho-mTOR, mTOR, Ub, CS, COX subunit II, COX subunit IV); 5) Enzyme Analysis (Citrate Synthase, COX); and 6) Muscle fiber size.
  • a CSA MRI will not be performed on Day 16, and biomarkers from muscle tissue will not be evaluated on Day 42.
  • MRI Magnetic resonance imaging
  • venous (antecubital) blood After an overnight fast, approximately 30 ml of venous (antecubital) blood will be collected within 1 hour of dosing time (0800 h), to measure safety labs and the following PD parameters: glucose, insulin, hsCRP, Lipid panel (HDL-c, LDL-c, Total Cholesterol, and Triglycerides). Blood samples for the determination of glucose concentration will be collected in chilled tubes containing heparin and analyzed immediately after collection.
  • a punch biopsy from the quadriceps femoris ( ⁇ 100 mg) will be obtained through a small cutaneous incision during local anesthesia (lidocain, 2%). An aliquot of the muscle tissue will be embedded in TissueTek® for histology; the remaining muscle tissue will be immediately rinsed in ice-cold homogenization buffer (50 mM Tris-HCl pH 7.5, 1 mM EDTA, 1 mM EGTA, 10 mM glycerophosphate, 50 mM NaF, 0.1% Triton-X, 0.1% 2-mercaptoethanol, 1 complete protease/phosphatase inhibitor tablet [Roche Diagnostics Ltd, Burgess Hill, UK]) or buffered saline, cleaned off connective tissue and blood, split into two aliquots (one aliquot should be around 40 mg) and submerged in liquid nitrogen and then stored at ⁇ 80° C. until further processing.
  • the Muscle Strength Test (MST):
  • the maximal amount of weight that the participant is able to lift for one repetition (1-RM) will be measured on a Hoist multi-station weight machine for the following exercises: leg press, knee extension, knee flexion, and bench press.
  • Isokinetic (Cybex) testing of knee extension/flexion will be done to assess deficiencies in rapid strength recruitment. Subjects will be seated on the testing device and strapped in to prevent the pelvis from sliding forward. The movement arm will be adjusted to the subject's leg length and the weight of the leg will be determined.
  • Isokinetic testing of the knee extensors and flexors will be performed at 0°/s, 60°/s and 180°/s. Four to five repetitions at each mode will be performed with the highest two values used for data analysis. Subjects will be familiarized with these procedures during the screening visit.
  • PPT Physical Performance Test
  • the modified PPT is a performance-based global measure of physical performance that evaluates the ability to perform usual daily activities, including both basic activities of daily living and instrumental activities of daily living. It includes 6 tasks that are timed: 1) climb a flight of 10 stairs, 2) stand up 5 times from a 16′′ high chair, 3) walk 50 ft, 4) put on and remove a coat, 5) pick up a penny placed 12′′ in front of the foot on the dominant side, and 6) lift a 7 lb book to a shelf ⁇ 12 in above shoulder height.
  • the other 3 tasks include an evaluation of 1) the ability to climb up and down 4 flights of 10 stairs, 2) the performance of a 360° turn, and 3) standing balance with feet side-by-side, semi-tandem, and full-tandem.
  • MRI will be used to quantify thigh muscle volume. Images will be acquired on a 1.5-T superconducting Siemens MRI scanner (Siemens, Iselin, N.J.) in the Human Imaging Unit facilities at Washington University School of Medicine. Bilateral T1-weighted axial images with and without fat saturation will be acquired using commercially available Siemens sequences starting 10 cm proximal to the distal edge of the femur and covering an approximate extent of 10 cm. After correcting/subtracting intramuscular fat, muscle volumes in each of the images will be determined by segmenting the cross-sectional muscle areas for each slice using Matlab software (Mathworks, Natick, Mass.) and summing the area by slice thickness for all slices. The analysis method will include a series of semi-automated steps such as image filtering/homogeneity correction, tissue identification by threshold analysis, manual review/correction of resulting classifications, and reporting of muscle volumes.
  • PD analysis will be based on the evaluable population. PD variables will be summarized with descriptive statistics (mean, standard deviation, median, range, and number of observations). Appropriate inferential analyses may be performed to evaluate treatment trends on change from baseline or between-group differences. In particular, there will be a matched pair analysis of each subject in the study. The analysis will compare PD variable levels prior to drug exposure with tests of subject plasma during each day of dosing and final study visit. Within-group change from baseline to Day 14, Day 14 to 16, Day 14 to 21, Day 14 to 29, and Day 14 to 42 and the differences among groups from baseline to Day 14, Day 14 to 16, Day 14 to 21, Day 14 to 29, and Day 14 to 42 will be assessed. Variables with skewed distributions will be log-transformed before analysis. If the data are not normally distributed after logarithmic transformation, appropriate nonparametric tests will be used.
  • reference to Compound 1 refers to (E)-[4-[3-(4-Fluorophenyl)-3-[4-[3-(morpholin-4-yl)propynyl]phenyl]allyloxy]-2-methyl-phenoxy]acetic acid sodium salt.
  • ANCOVA Statistical analysis used analysis of covariance
  • LSMEAN least-squares mean
  • FIG. 1 shows a graph of mean changes from baseline in muscle strength representing the primary analysis (reflecting multiple imputation for missing and invalid data) of the effect of administration of Compound 1 on performance of a repeated measures knee extension strength test during (day 0 to day 14) and after (following day 14) limb immobilization in human subjects.
  • the data supporting the graph shown in FIG. 1 is also provided in Table 1 below.
  • FIG. 2 shows a graph of mean changes from baseline in muscle strength representing supportive analysis (using all available data for subjects with valid data, excluding protocol violators, i.e., no imputation) of the effect of administration of Compound 1 on performance of a repeated measures knee extension strength test during (day 0 to day 14) and after (day 14 to day 21 and day 21 to day 29) limb immobilization in human subjects.
  • Table 3 includes the raw values of maximum muscle strength on the knee extension (KE) as measured in pounds (lbs) in the repeated measures knee extension strength test.
  • the values in this data set reflect no calculation, imputation, or derivation of any kind
  • D1 is day 1 (baseline, pre-dose)
  • D14 is day 14 (day when brace is removed)
  • D21 is day 21 (primary endpoint for the study)
  • D29 is day 29, which is the final assessment during the treatment period.
  • D42 is day 42, which is a safety, follow-up assessment, which was not intended for statistical analysis.
  • Compound 1 was effective in reducing muscle atrophy during immobilization (i.e., reducing the rate of loss of muscle strength during immobilization relative to control subjects that received placebo) and for reducing atrophy following immobilization (i.e., increasing the rate of return of muscle strength to baseline following immobilization relative to control subjects that received placebo).
  • a PPAR ⁇ agonist would be associated with preventing muscle atrophy (i.e., reducing the rate of loss of muscle strength during immobilization relative to control subjects that received placebo).
  • Analysis showed that in subjects treated with Compound 1, measures of muscle atrophy that would be expected did not occur or could not be measured. In other words, there was a significant reduction in the rate of loss of muscle strength during immobilization in subjects that received Compound 1 relative to control subjects that received placebo. Further, the rate of loss of muscle strength during immobilization in subjects that received Compound 1 was reduced to almost zero, since subjects that received Compound 1 did not show a significant loss of muscle strength compared to their baseline measurements.

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US15/950,949 US10456406B2 (en) 2013-09-09 2018-04-11 Use of a PPAR-δ agonist for reducing loss of muscle strength, muscle mass, or type I muscle fibers in an immobilized limb
US16/660,090 US11096946B2 (en) 2013-09-09 2019-10-22 Use of a PPAR-δ agonist for reducing loss of muscle strength, muscle mass, or type I muscle fibers in an immobilized limb
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US20180296562A1 (en) 2018-10-18
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CA2923422C (fr) 2021-09-07
US20170027950A1 (en) 2017-02-02
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EP3043789A1 (fr) 2016-07-20
US20150072985A1 (en) 2015-03-12
US20220072005A1 (en) 2022-03-10
US11096946B2 (en) 2021-08-24
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CA2923422A1 (fr) 2015-03-12

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